Jet Body,3/4"B(w)x 3/8"B(a) Horizon # 55-605-1050 Manf. Custom Molded Products Manf. # 23420-000 2-1/2" Spa Jet Bodies- hole size 1-11/16" Jet body assemblies include manifold, venturi, gasket&wall fitting Includes complete jet internal, fits all 2-1/2" jet body styles, adjustable flow